Carburetor



1964 M. F. STERNER ETAL 3,157,715

CARBURETOR Filed April 3, 1961 MELVIN F STERNER NEIL M. ROMEO BY FREDERICK J.MARSEE CLAUDE W.MILES JR. 2 x/ w r ATTORNEYS F|G.5. 0 f1 United States Patent tion of Michigan Filed Apr. 3, 1961, Ser. No. 100,139 8 Claims. (Cl. 261-1) The invention relates to carburetors for use with internal combustion engines and similar devices and refers more specifically to a center stud for holding an air filter in position over the air intake passage of the carburetor and means for non-rotatably mounting the stud centrally of the carburetor air intake passage in an axially fixed position.

In the past air filters positioned over the air intake passage of a carburetor for use with internal combustion engines and similar devices have often been fastened to the carburetor by means of a threaded stud secured to the carburetor in conjunction with a wing nut. These studs in the past have usually been positioned to one side of the air intake passage and have often been axially movable and rotatable during installation and removal of the air filter. Thus installation and removal of the air filter has previously been unnecessarily complicated.

For example, in installing the air filter with an offset mounting stud secured to the carburetor it is necessary not only to center the air filter over the carburetor air intake passage to thread the stud through the opening therefor in the air filter but also to angularly rotate the air filter so that the off-center stud will line up with a similarly off-center opening through the air filter. Such installation is disadvantageous, particularly when it is remembered that air filters are usually removed and installed while holding the filter at arms length and leaning over the fender of an automobile.

Additionally with studs which are movable axially and are held in position only by positioning of the nut secur ing the air filter thereto the air filter must be positioned while also holding the stud in an axially fixed position. Thus two persons may be required to install an air filter. Mounting of the stud so that it is rotatable further complicates the installation and removal of the air filter in that while holding the stud in an axially fixed position it must also be prevented from rotating while the air filter is held at arms length and rotated to align the offcenter stud and the stud opening of the air filter.

It is therefore the purpose of the present invention to provide a stud and mounting bracket therefor for mounting an air filter on a carburetor which mounting bracket positions said stud centrally over the air intake passage of the carburetor.

Another object is to provide a stud and mounting bracket therefor for mounting an air filter on a carburetor which mounting bracket positions said stud centrally over the air intake passage of the carburetor and prevents both axial and rotational movement of the stud.

Another object is to provide a stud and mounting bracket therefor for mounting an air filter on a carburetor which mounting bracket positions said stud centrally over the air intake passage of the carburetor and which bracket is secured to the carburetor at one side of the air intake passage thereof.

Another object is to provide a carburetor with a stud and mounting bracket for the stud operable to secure an air filter to the carburetor as set forth above wherein the mounting bracket includes means cooperable with said carburetor to prevent rotation of the mounting bracket with respect to the carburetor.

Another object is to provide a center stud and mounting 3,157,715 Patented Nov. 17, 1964 bracket therefor for securing a heavy duty air filter in position centrally of the air intake passage of a carburetor, said bracket including a plurality of supporting arms connected to the carburetor at a plurality of points around the periphery of the air intake passage of the carburetor.

Another object is to provide a center stud and mounting bracket therefor as set forth above which is simple in construction, economical to manufacture and efiicient in use.

Other objects and features of the invention will become apparent as the description proceeds, especially when taken in conjunction with the accompanying drawings, illustrating a preferred embodiment of the invention, wherein:

FIGURE 1 is a plan view of a carburetor including a center stud for an air filter mounted centrally of the air intake passage of the carburetor on a non-rotatable bracket against axial and rotational movement in accordance with the invention.

FIGURE 2 is a partial elevation view of the carburetor illustrated in FIGURE 1.

FIGURE 3 is a perspective view of the center stud mounting bracket illustrated in FIGURES l and 2.

FIGURE 4 is a plan view of a modified center stud mounting bracket for use with heavy air filters constructed in accordance with the invention.

FIGURE 5 is an elevation view of the center stud mounting bracket illustrated in FIGURE 4 taken in the direction of arrow 5 in FIGURE 4.

With particular reference to the figures of the drawing, one embodiment of the present invention will now be disclosed.

As shown in FIGURES 1 and 2 the center stud 10 to which the air filter 12 is secured is mounted centrally of the air intake passage 14 of the carburetor 16 on the bracket 18. Bracket 18 is secured to the carburetor 16 at one side of the air intake passage 14 and includes an end 20 formed to prevent rotation of the bracket 18 about the mounting means therefor. Center stud 10 is secured to the end 22 of the bracket 18 against both axial and rotational movement relative to the bracket 18.

More specifically the carburetor 16 comprises the air horn and fuel bowl cover member 24, the throttle body and fuel bowl casting 26, and the metering spacer memher 28 securcd together by convenient means such as bolts 30 and sealed by gaskets 32 and 34. The air horn and fuel bowl cover 24 includes the air intake passage 14 having the choke 36 positioned therein and actuated by automatic choke mechanism 38. Also included in the air horn and fuel bowl cover member 24 of the carburetor 16 is an upstanding abutment 40 which houses a portion of the power valve of the carburetor 16.

With such carburetors it has been the practice in the past to mount a stud on the air horn and fuel bowl cover member 24 at one side of the air intake passage 14 on which an air filter similar to filter 12, shown partly in section in FIGURES 1 and 2, but having an off-center stud opening therethrough is mounted so that it is centrally positioned over the air intake passage 14. Such studs have in the past often been in the form of bolts which are both rotatable and axially movable when not secured in position by means such as wing nut 41 clamping the air filter to the carburetor.

With these prior constructions the installation and removal of the air filters has been unnecessarily complicated often requiring two persons to mount a single air filter due to the necessity of angular rotation of the air filter after it has been positioned centrally of the air intake passage and the simultaneous necessity of holding the bolt in a predetermined axial position While preventing rotation thereof. The mounting bracket 18 is provided in accordance with the invention to eliminate these difliculties in that bracket 18 mounts the center stud 10 centrally of the air intake passage 14 in a fixed axial position while preventing rotation thereof.

Bracket 18 may be stamped from metal or constructed of other rigid material in the configuration illustrated best in FIGURE 3. A central opening 46 is provided in bracket 18 through which bolt 48 extends ino a threaded opening in abutment 40 to secure bracket 18 to the abutment with the end 22 of the bracket positioned above the choke operating mechanism 38 and with the end 20 of bracket 18 positioned adjacent the abutment 40.

Down-turned sides 42 and 44 are provided on bracket 18 to give added strength thereto. The end 20 of the bracket 18 is provided with an arcuate recess 50 therein and is bent so that with the bracket 18 mounted on abutment 40 the arcuate recess 50 surrounds the compile mentary arcuate portion 52 of the abutment 40. The bracket 18 is thus prevented from rotation about the axis provided by the mounting bolt 48.

The center stud 10 is provided with a square shank portion 54 which is inserted through a similar square opening 56 in the end 22 of the bracket 13 so that the stud 10 is prevented from rotating relative to the bracket 18. In addition the down-turned edges 42 and 44 of the bracket 18 at the end 22 are slightly crimped over the head of the bolt forming the stud 10 to prevent axial movement thereof relative to the bracket 18.

Thus in accordance with the invention there is provided an air filter mounting stud 10 which is positioned centrally of the air intake passage 14 which is axially stationary and non-rotatable. In mounting an air filter 12 thereon it is only necessary to align the air filter centrally of the carburetor and thread the stud 10 through the central opening 58 in the air filter 12 and secure the air filter to the carburetor by means of Wing nut 41. Such operation it will be understood can be easily accomplished during either removing or installing the air filter by one person.

In FIGURES 4 and S a modification 18a of the mounting bracket 18 is provided for use wherein heavy air filters are to be installed on a carburetor. The bracket 18a mounting the stud 10a illustrated in FIGURES 4 and is provided with three separate arms 60 having openings 62 therethrough which may be secured to abutments provided on a carburetor at a plurality of points around the air intake passage thereof by convenient means similar to bolts 48. Inasmuch as more than one arm of the bracket 18a will be secured to the carburetor it is not necessary to provide a U-shaped recess or an end such as recess 50 and end 20 on the bracket 18a to prevent rotation of the bracket 18a. The edge portions 64 of the arms 60 of bracket 18:: are down-turned to provide strength for arms 60 while the edge portion 66 may be crimped over the square shanked bolt a to prevent aixal movement thereof as before.

The drawings and the foregoing specification constitute a description of the improved carburetor air filter center stud and mounting bracket therefor in such full, clear, concise and exact terms as to enable any person skilled in the art to practice the invention, the scope of which is indicated by the appended claims.

What we claim as our invention is:

l. A carburetor having an air intake passage for drawing air into the carburetor to be mixed with fuel therein, an air filter for filtering air drawn into the air intake passage, a mounting bracket secured to the carburetor adjacent said air intake passage having a portion of downwardly opening U-shaped cross section extending transversely of, and over the air intake passage including a non-circular opening extending therethrough substantially centrally of the air intake passage, and a center stud having a similarly non-circular shank portion inserted through the opening in the mounting bracket, the leg portions of the U-shaped cross section of the mounting bracket adjacent said opening extending downwardly to secure the stud in an axially fixed position.

2. Structure as set forth in claim 1 wherein said mounting bracket includes a plurality of the transversely extending portions spaced angularly about a single noncircular opening therethrough.

3. A mounting bracket for mounting a center stud for an air filter centrally of a carburetor air intake passage in a fixed axial and non-rotatable position comprising a central mounting portion having a U-shaped cross section, a pair of end portions extending at an angle to the central portion in the same direction also having a U-shaped cross section, means secured to the free end of one of the end portions for supporting a center stud for an air filter or the like in a fixed axial and non-rotatable, position, means secured to the free end of the other end portion for preventing rotation of the mounting bracket about the central mounting portion thereof.

4. Structure as set forth in claim 3 wherein said means for supporting a center stud comprises a U-shaped portion including a connecting portion, extending substantially parallel to said central portion, secured to the free end of the one end portion and having a non-circular opening through the connecting portion.

5. Structure as set forth in claim 3 wherein said means for preventing rotation of the mounting bracket comprises a tab depending from the free end of the other end portion of the mounting bracket having an arcuate recess therein.

6. A carburetor having an air intake passage for drawing air into the carburetor to be mixed with fuel therein, an air filter for filtering air drawn into the air intake passage, a mounting bracket secured to the carburetor adjacent said air intake passage at only one side thereof having a cantilevered portion extending over the air intake passage in spaced relation thereto, said cantilevered portion of said mounting bracket being provided wih a noncircular opening located centrally of the air intake passage and a center stud secured to the cantilevered portion of the mounting bracket centrally of the air intake passage extending through the non-circular opening over the air intake passage and having a non-circular shank portion cooperable with the non-circular opening in the bracket to prevent rotation of the stud relative to the bracket.

7. A carburetor having an air intake passage for drawing air into the carburetor to be mixed with fuel therein, an air filter for filtering air drawn into the air intake passage, an elongated rigid mounting bracket U-shaped in transverse cross section centrally secured to the carburetor adjacent the air intake passage at only one side thereof having a cantilevered porion extending over the air intake passage in spaced relation thereto and a center stud secured to the cantilevered portion of the mounting bracket centrally of the air intake passage for mounting the air filter over the air intake passage wherein installation and removal of the air filter is facilitated, said stud being provided with a head thereon and the outstanding legs of the U-shaped cross section adjacent the stud being engaged with the stud head to prevent relative axial movement between the stud and bracket.

8. A carburetor having an air intake passage for drawing air into the carburetor to be mixed with fuel therein, an air filter for filtering air drawn into the air intake passage, a mounting bracket secured to the carburetor adjacent said air intake passage at only one side thereof comprising an elongated rigid member U-shaped in transverse cross-section centrally secured to the carburetor, and having a cantilevered portion extending over the air intake passage in spaced relation thereto, an arcuate abutment on said carburetor adjacent one end of the mounting bracket, an arcuate recess in said one end of the mounting bracket engaging the arcuate abutment and preventing rotation of the mounting bracket relative to the carburetor and a center stud secured to the canti- References Cited in the file of this patent UNITED STATES PATENTS Cardinal Mar. 24, 1925 Beck July 7, 1925 6 Carter Ian. 30, Fisher July 17, Schulz Dec. 4, Herreshoff et a1. Aug. 7, Sebok June 19, Scutt Mar. 16, Muller May 27, Sebok Feb. 3, 

1. A CARBURETOR HAVING AN AIR INTAKE PASSAGE FOR DRAWING AIR INTO THE CARBURETOR TO BE MIXED WITH FUEL THEREIN, AN AIR FILTER FOR FILTERING AIR DRAWN INTO THE AIR INTAKE PASSAGE, A MOUNTING BRACKET SECURED TO THE CARBURETOR ADJACENT SAID AIR INTAKE PASSAGE HAVING A PORTION OF DOWNWARDLY OPENING U-SHAPED CROSS SECTION EXTENDING TRANSVERSELY OF, AND OVER THE AIR INTAKE PASSAGE INCLUDING A NON-CIRCULAR OPENING EXTENDING THERETHROUGH SUBSTANTIALLY CENTRALLY OF THE AIR INTAKE PASSAGE, AND A CENTER STUD HAVING A SIMILARLY NON-CIRCULAR SHANK PORTION INSERTED THROUGH THE OPENING IN THE MOUNTING BRACKET, THE LEG PORTIONS OF THE U-SHAPED CROSS SECTION OF THE MOUNTING BRACKET ADJACENT SAID OPENING EXTENDING DOWNWARDLY TO SECURE THE STUD IN AN AXIALLY FIXED POSITION. 